int
evfilt_socket_knote_create(struct filter *filt, struct knote *kn)
{
struct epoll_event ev;
if (linux_get_descriptor_type(kn) < 0)
return (-1);
/* TODO: return EBADF? */
if (kn->kn_flags & KNFL_REGULAR_FILE)
return (-1);
/* Convert the kevent into an epoll_event */
kn->data.events = EPOLLOUT;
if (kn->kev.flags & EV_ONESHOT || kn->kev.flags & EV_DISPATCH)
kn->data.events |= EPOLLONESHOT;
if (kn->kev.flags & EV_CLEAR)
kn->data.events |= EPOLLET;
memset(&ev, 0, sizeof(ev));
ev.events = kn->data.events;
ev.data.ptr = kn;
return epoll_update(EPOLL_CTL_ADD, filt, kn, &ev);
}
int
evfilt_read_knote_create(struct filter *filt, struct knote *kn)
{
struct epoll_event ev;
if (linux_get_descriptor_type(kn) < 0)
return (-1);
/* Convert the kevent into an epoll_event */
#if defined(HAVE_EPOLLRDHUP)
kn->data.events = EPOLLIN | EPOLLRDHUP;
#else
kn->data.events = EPOLLIN;
#endif
if (kn->kev.flags & EV_ONESHOT || kn->kev.flags & EV_DISPATCH)
kn->data.events |= EPOLLONESHOT;
if (kn->kev.flags & EV_CLEAR)
kn->data.events |= EPOLLET;
memset(&ev, 0, sizeof(ev));
ev.events = kn->data.events;
ev.data.ptr = kn;
/* Special case: for regular files, add a surrogate eventfd that is always readable */
if (kn->kn_flags & KNFL_FILE) {
int evfd;
kn->kn_epollfd = filter_epfd(filt);
evfd = eventfd(0, 0);
if (evfd < 0) {
dbg_perror("eventfd(2)");
return (-1);
}
if (eventfd_write(evfd, 1) < 0) {
dbg_perror("eventfd_write(3)");
(void) close(evfd);
return (-1);
}
kn->kdata.kn_eventfd = evfd;
if (epoll_ctl(kn->kn_epollfd, EPOLL_CTL_ADD, kn->kdata.kn_eventfd, &ev) < 0) {
dbg_printf("epoll_ctl(2): %s", strerror(errno));
return (-1);
}
kn->kn_registered = 1;
return (0);
}
return epoll_update(EPOLL_CTL_ADD, filt, kn, &ev);
}
